The email – which would have been sent after the State Departmentasked Clinton to turn over her emails – reportedly advised Platte River to save only emails sent within the most recent 30 days.

The disclosures, in a letter Monday from Wisconsin Sen. Ron Johnson revealed employees at the company primarily responsible for managing Clinton’s emails, Platte River Networks, were concerned about getting swept up in what appeared to be “some shady [sic] s–“.

Platte River was hired to maintain Clinton’s sever once she left the State Department.

Jindal listed 13 bullet points that contributed to the culture’s “brew of decay”.

Employees at the Denver-based IT company that Hillary Clinton hired in 2013 to manage herprivate email network expressed concern that they were “covering up” something “shady”.

“Ijustthink if we have it in writing that they told us to cut the backups, and that we can go public with our statement saying we have backups since day one, then we were told to trim to 30days (sic), it would make us look a WHOLE LOT better”, the unnamed employee continued.

Datto’s work on the Clinton email system became public Tuesday when the Republican chairman of the Senate Homeland Security Committee sent the company a lengthy letter seeking information about the role it and other firms played in managing the Clinton email system.

Earlier this year, Clinton’s office said that she did not begin using the privateaccount, Clintonemail.com, until the middle of March 2009. Clinton has claimed that she did not send or receive classified information on her server. Clinton has said publicly that she has turned over all the emails she is required to, but several congressional committees are investigating.

The employee indicates in the email that Clinton’s team asked them to change the back-up duration between October and February, presumably of 2014/2015, though that isn’t explicitly stated in the portion of the email included in Johnson’s letter.

The Petraeus emails, first discovered by the Defense Department and then passed to the State Department’s inspector general, start on January 10, 2009, with Clinton using the older email account. Though the source noted that this summer Platte River employees were “surprised” to learn that the Clinton data was being backed up in an offsite cloud, which wasa more extensive backup than Platte River officials had anticipated.

Platte River has struggled to deal with the scrutiny it has received because of its relationship with Clinton.

‘Despite these communications, it is unclear whether or not this course of action was followed, ‘ Johnson wrote.

In an ongoing review of Clinton’s work emails, the State Department and intelligence agencies have found more than 400 containing classifiedinformation, including at least two declared “Top Secret”, the most sensitive national security data. But after the Petraeus emails surfaced and showed she had not turned over a few emails that used her new address, her aides said said she could not turn over emails because they had not been captured on her private server.

Spokesmen for the Federal Bureau of Investigation and the Clinton campaign did not respond late Tuesday to requests for comment.